How to add subtitles to a video
Automatic, manual, burned-in, or SRT — here's how to add subtitles to a video the right way for short-form, and the small decisions that make or break readability.
In this article
Automatic vs manual subtitles
Typing subtitles by hand and syncing them line by line is accurate but slow, and for anything longer than a minute it's rarely worth it. Automatic subtitle tools transcribe the speech and place timed text for you, then let you fix the few words they miss. For short-form clips, automatic-then-edit is almost always the right workflow: you get most of the way there instantly and spend your time only on corrections.
Burned-in vs SRT files
An SRT is a separate subtitle file you upload alongside the video; burned-in subtitles are baked into the picture. For social platforms, burned-in is safer — the text plays the same everywhere, can't be turned off, and isn't re-rendered by each app's native caption system. SRT makes sense when a platform needs an editable transcript, but for Shorts, Reels, and TikTok, burn them in.
Style for sound-off viewing
Most short-form viewers watch on mute, so subtitles are part of the design, not an afterthought. Word-by-word highlighting that tracks the speech holds attention better than static blocks. Keep the type large, high-contrast, and clear of platform overlays like the TikTok caption bar so nothing important gets covered.
Fix the words that matter before you export
Every auto-subtitle tool mishears names, brands, and jargon. The tools worth using keep the text editable until export so you can correct a name or rewrite a line against the real footage. If a tool locks the subtitles the moment they're generated, fixing one word means regenerating the whole clip — check for that before you commit.
Doing it in FrameOS
FrameOS generates subtitles as part of producing a clip: bring in a video, and it transcribes, times, and styles word-by-word captions you can edit and restyle, then burns them in at export. Because it's built for clips, the subtitles come reframed and placed for vertical short-form rather than bolted onto a landscape file.
FAQ
What's the fastest way to add subtitles to a video?
Use an automatic subtitle generator that transcribes the speech for you, then correct the few words it misses. Hand-syncing every line is only worth it for very short or very high-stakes clips.
Should subtitles be burned in or a separate file?
For social platforms, burn them in — they play consistently everywhere and can't be stripped or re-rendered. Use an SRT file only when a platform specifically needs an editable transcript.
Can I edit auto-generated subtitles?
With the right tool, yes. FrameOS keeps subtitle text and styling editable until export so you can fix a misheard name before the clip is rendered.